Planoobaph co



D. M. BOWEN.

RADIATOR. 4 APPLICATION FILED DEC- 13, 1916- 1,31

Patentd July 29, 1919.

2 SHEETS-SHEET l.

n. M. BOWEN.

= RADIATOR.

APPLICATION FILED DEC. 13, i916. '1 ,3 1 1 ,797. Patented July 29, 1919.

2 SHEETS-SHEET 2.

DAVID M. BOWEN, OF LOS AN G-ELES, CALIFORNIA.

RADIATOR.

Specification of Letters Patent.

Patented July 29, 1919.

Application filed December 13, 1916. Serial No. 186,799.

To all whom it may concern:

Be it known that I, DAVID M. BOWEN, a citizen of the United States, residing at Los Angeles, in the county of Los Angeles and State of California, have invented a new and useful Radiator, of which the followin is a specification.

My invention relates to the art of heating and ventilating, and the principal object of the invention is to provide a new and useful form of radiator unit for use in that art.

While I have illustrated and described a radiator unit which is made an integral part of a hot air furnace, I do not wish to be understood as limiting myself to this application alone, the term radiator unit beingused in the specification and the claims to denote a device for transferring the heat of combustion of heated gases passing through the interior of the device to a body of air surrounding it. My radiator unit may be used with or without a jacket, as will be obvious from the following description.

In the heating and ventilating art, the cost of construction is by far the greatest factor, andmy invention is especially designed to be built up out of sheet iron or steel in an ordinary tin shop wlthout requiring special forms or tools for its production, all of the sheet metal therein being disposed in plane surfaces and all of the angles being plane dihedral ones which are readily formed up by the ordinary sheet metal working tool.

The efliciency of all sorts of heating devices may be measured by the ratio of the average initial temperature of the products of combustion to the average temperature of the flue gases, the lower the temperature of the flue gases, other things being equal,

the greater the efficiency of theheat. My

invention is especially designed to extract the greater portion of the heat from the products of combustion so that the temperature of the flue gases is very low and the efliciency is very high. Where air is subjected tovariations in temperature, and especially where'heated air which is loaded with water vapor is cooled, condensation is likely to take place, and it is a further object of my invention to provide means for preventing an accumulation of the water of condensation.

Further objects and advantages will be made evident hereinafter, or will be obvious to one skilled in the heating and ventilating art from a perusal of the annexed specification and drawings.

In these drawin s,

Figure 1 is a site view of a hot air furnace equipped with my invention.

Fig. 2 is a section through the outer jacket of the apparatus shown in Fig. 1, the radiator unit being shown in elevation.

Fig. 3 is a section on a plane represented by the line 33 of Fig. 1, this plane being viewed in the direction of the arrows.

Fig. 4 is a cross-section on a plane represented by the line 44 of Fig. 3.

Fig. 5 is a cross-section on a plane represented by the line 5-5 of Fig. 2.

Fig. 6 is a perspective view of a portion of my heater certainof the parts being broken away to better illustrate the invention.

Fig. 7 is a section on a plane represented by the line 77 in Fig. 1.

In the form of my invention illustrated in these drawings, a hot air furnace is shown consisting of an outer jacket 11 which is perforated as shown at 12 near its lower end, so that the lower portion of its interior is in open communication with the outer air. Any desired number of hot air pipes 13 may be connected into the top of the jacket and connected to registers located in the different rooms. Located inside the jacket 11 is a radiator unit 20, this unit consisting of a rectangular box having sides 21 and 22, ends 23, and a top 24. A fine 25 passes through the jacket 11 and communicates with the top of the interior of the radiator unit 20, this flue 25 beingconnected by suitable piping,- not shown, with a chimney which is also not shown. Located in the bottom of the radiator unit 20 is a 'burner30 adapted to use gas. As the burner forms no part of the present invention, various other types of gas or oil burner may be substituted therefor, or a grate in which solid fuel may be burned may be substituted without in any way departing from the spirit of my invention, the word burner being used in the specification and the claims to denote all of these obvious mechanical equivalents.

Formed in the ends 23 of the radiator unit 20 are a series of inclined slots 40 and formed in the sides 21 and 22 are a series of horizontal slots 41. The slots 41 extend completely across the sides 21 and 22 joining the slots 40 which extend only partly across the ends 23. Set into theslots i0 and 6E1 are a series of sheet metal inserts-50, these inserts having allof"theirsends"joined to the Walls of the radiator unit in a gas tight relationship therewith so that the completed unit will contain the heated gases from the burner without allowing any of these gases to leak intothe spacebetween the radiator unit 20 and the interior of the jacket-ll. g'l he-slotsdQand ilare-so located, and theinnerjor closedend 51 of each insert is so. formed, that a space .is left -loetween the end 51 and the nearestwall offthe with the spacebetween the jacket l1 andthe radiatorunit. The-hotainfiuesGO are so proportioned that;a .-ser1es of. combustion; fiues filtare formed these fines connectlng e afich space within the radiator unit; 20; With-the next spaceabove. The-lower portion of the radiator unit,20 is open to admit air for; combustion and for mixingiitwith the prod ciencypfmy heater, I use a series: of cold air I;

flues J70, these gfiues' being rectangular in form-and-v slightlyq-smaller than ,.the ,hot air fiues into which their! inner; ends are inserted. ,Thecold air fiues project through thewalls ofthe jacket 11- and serve to supply cold air-to the-loxvest portiongof theIinserts- 50.,-.Inwpr acticezthecold airvfiues- 7 0 may be;

omitted; from the two lower inserts 50.

The method of: operation, of my invention is as follows The burnersSO'being supplied j with,gas,,-which is lighted, the pIOCluCtSwOfL combustion are somewhat diluted Wlthg air,

passing upwardly throngh. 'the-interior of the radiator 20; and outwardly, through the fine 25 1 In; their passage 1 upwardly they; pass around the inserts. 50 and through thejfiues, 61. It -,wil1'.be;: noted that to, do: thiswthe's'e heated gases :m ls't ifollow, a! tortuous-path impinging on the sheettiron surface: forming K the wallsof the: radiator unit iQO, and the 1 inserts-5,0. It willyalso be noted that each I of ,the inserts. '50 formswith; the walls of the radiator unit-120: a sortiof pockemthetop of Which isosomewhat -,h ighen than ;the; outlet.

By -majking,-a succession of pockets in this manner it is,r possible to greatly; delay the passage of the ,h'ot; gases'throughthe -unit ndither r xt a t alerge-iwrtion of their he t-'befQr ith y: ar al owecltq pas r o the flue-25 Partof-the air; in the space Ibeeens he ja k t; 1 and the rediat n alsof'follows, a tortuous path through the interior of the inserts 50 entering these inserts from either end,

*Thetwo lowerinserts 50 also take air from between the jacket 11 and the radiator unit-2O through the hot air fiues 60. The upper inserts 50 are supplied with cold outside air "through the cold air fiues 70.

No pockets are formed in which the air to be heated can collect, this air passing constantly upward between smooth 1 surfaces during -.i ts'--passage through the; heater.

Due to the considerable production of Wate -vaporx by: the combustion ofgthe-gas, V there is "considerable glikelihood of'zconden sation takingplace inside the unit-20. -;The inclination of the inserts 50 being down- Ward, .anywater condensing ,zthereonv drains oil, and (rapid rusting away of "the sheet metal surfaces, due to; moisture standing; thereon, is prevented. a e P lVhil'e I. havespoken oii :rnya invention; as constructed of sheet iron o ..stee1',-it isobvious that it could be constructed .of other sheet; material, orzby dividing it into suit-able sections; it could be cast from iron ror-,other e ;m aterial. All such obvious mi norchanges form-'apartof my'invention, and I reserve the' right to makeyany; such modifications, limiting-my invention OHlyubYFft QrQIHlGXGC h claims. r

I claim: v 1. An; air heater comprising a rectangular box composed of sheet iron; a burner in the r bottomvof saidhox, afluedn thertop ofisaid box a series, 0f' l11S81El3S (set into open slots'insaid box, saidinsertsbeinghpen atoneside and at each end to' the space 1 surrounding f the =box, said inserts making {atcontinuousi gas tight j oi'nt- I with the ends and sides ofs '1 05 said box; a" series of hot air fines; eachfiue connectingthe inner end of one of said} inserts ,with the? space on the side ofthebox opposite the mouth of the; insert 'af'shell' having openings formed inwthetlower end 1 thereof through which @cold; :air is admitted to the heating space ibetweenasaid Yshell and saidvrectangular box HlGLIlSufOI jtaking, air: 7

1 from said heating space anda series ofcold" air flues each extending through .an:' openings 1 1 5 in said shell and connecting with thegouter endof onelofsaid hot air-fines.

2.--,A1: 1 air; heater comprising a rectangular box' composed of sheet iron; a-.bnrner ingthe bottom of said box a fluednethetop of-saidr .1 box; a series of inserts-iset into openvslots, formed a'1ternately3,fromeither: side of said-"Z boX, sjaid inserts-being open atone; side and 1 ateach end "to ithe: space surrounding the box, said inserts making. a continuousgas" tlght joint with the ends and sides of said f box; a series of hot air fiue's,1-each flue icon-. necting the inner end of, one of {said inserts with the space on the side of the boX- -oppo-' site Etheg mouth; of the insert a' shell inclosing 139 said radiator unit and having openings formed in the lower end thereof through which cold air is admitted to the heating space between said shell and said rectangular box; means for taking air from said heating space; and a series of cold air flues each extending through an opening in said shell and connecting with the outer end of one of said hot air flues.

3. An air heater comprising a rectangular box composed of sheet iron; a burner in the bottom of said box; a flue in the top of said box; a series of inserts set into open slots in said box, said inserts being open at one side and at each end to the space surrounding the box, each insert being so inclined that it is higher at the point where it joins the said box than at any other point, said inserts making a continuous gas tight joint with the ends and sides of said box; a series of hot air fiues, each flue connecting the inner end of one of said inserts with the space on the side of the box opposite the mouth of the insert; a shell inclosing said radiator unit and having openings formed in the lower end thereof through which cold air is admitted to the heating space between said shell and said rectangular box; means for taking air from said heating space; and a series of cold air fiues each extending through an opening in said shell and connecting with the outer end of one of said hot air flues.

L. An air heater comprising a rectangular box composed of sheet iron; a burner in the bottom of said box; a fine in the top of said box; aseries of inserts set into open slots formed alternately from either side of said box, said inserts being open at one side and at each end ,to the space surrounding the box, each insert being so inclined that it is higher at the point where it joins the said box than at any other point, said inserts making a continuous gas tight joint with the ends and sides of said box; a series of hot air fines, each flue connecting the inner end of one of said inserts with the space on the side of the box opposite the mouth of the insert; a shell inclosing said radiator unit and having openings formed in the lower end thereof through which cold air is admitted to the heating space between said shell and said rectangular box; means for taking air from said heating space; and a series of cold air fines each extending through an opening in said shell and connecting with the outer end of one of said hot air fiues.

In testimony whereof I have hereunto set my hand at Los Angeles, California, this 5th day of December, 1916.

DAVID M. BOWEN.

copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

